<div dir="ltr"><div><div><div><div><div>Hi all,<br><br></div>Regarding thsi proposal, I've moved waterway=duct to waterway=pressurized.<br></div>It covers many kind of situations, from natural siphons to man made penstocks.<br></div><div>While a penstock is always a (man made) pipeline, a natural siphon isn't. Finally we may get more correct use of pipeline and canals which are currently overused for underground and pipe flow facilities.<br></div><div><a href="https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies">https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies</a><br><br></div>It introduces this new value beside all existing open flow values (river, stream, canal...).<br><br></div>Feel free to complete comments, all the best<br><br></div>François<br><div class="gmail_extra"><br><div class="gmail_quote">2017-12-07 11:06 GMT+01:00 François Lacombe <span dir="ltr"><<a href="mailto:fl.infosreseaux@gmail.com" target="_blank">fl.infosreseaux@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi,<br><div><div class="gmail_extra"><br><div class="gmail_quote"><span class="gmail-">2017-12-07 2:42 GMT+01:00 Andrew Davidson <span dir="ltr"><<a href="mailto:theswavu@gmail.com" target="_blank">theswavu@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">1. waterway is the wrong key. Waterways are for open-channel features. There is already a man_made=pipeline for pipe flow. I'm not sure why we need a different tag for this.<br></blockquote></span><div>Can you link me where waterway is explicitly described for open-channel ways only please ?<br><br></div><div>man_made=pipeline is not a water specific key and It's a great benefit to get raw water hydrographic graph by looking at waterway=* only.<br></div><div>Like highway=* is not specific to open air roads but for bridges and tunnels too, I don't see any objection to involve tubes and pressure pipes into waterway, with a new dedicated value as to not break things regarding existing consumers.<br></div><span class="gmail-"><div><br> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
2. duct is the wrong value. Ducts refers to low pressure pipes carrying gases.<br></blockquote><div><br></div></span><div>I agree it's not perfect<br><br></div><div>How can I refine it ?<br></div><div>It is intended for pipe flow waterways<br><br></div><div>I really have difficulties to understand a tunnel without tube carrying pipe flow water as man_made=pipeline<br></div><div>Then waterway=pipeline sounds more restrictive than its actual target.<span class="gmail-HOEnZb"><font color="#888888"><br><br></font></span></div><span class="gmail-HOEnZb"><font color="#888888"><div>François<br></div><div><br></div></font></span></div></div></div></div>
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